| Rapid Geometry Analysis for Earthquake-induced and Rainfall-induced Landslide Dams in Taiwan |
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| 作者姓名： | Kun-Ting CHEN Yu-Shu KUO Chjeng-Lun SHIEH |
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| 基金项目： | This study was supported by the National Science Council of the Chinese Taipei under Contracts No. NSC 1Ol-2m8-E-006-001. The project name is Modeling of The Compound Disaster in Hsiaolin Village. The Wenchuan earthquake-induced landslide dam data were provided by the Professor CUI Peng and Key Laboratory of Mountain Hazards and Earth Surface Process, CAS, Chengdu, China. The authors thank for their support. |
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| 摘 要： | Stability analysis of the dam is important for disaster prevention and reduction. The dam＇s geometry plays an important role in understanding its stability. This study develops a rapid landslide dam geometry assessment method for both earthquake-induced and rainfall-induced landslide dams based on nine real cases collected in Chinese Taipei and 214 cases collected worldwide. For simplification purposes, a landslide dam is classified into triangular or trapezoidal. The rapid landslide dam geometry assessment method in this paper uses only satellite maps and the topographic maps to get landslide area, and then analyze the dam geometry. These maps are used to evaluate the area of the landslide and the slope of the river bed. Based on the evaluation information, the proposed method can calculate dam height, the length of the dam, and the angles of the dam in both upstream and downstream directions. These geometry parameters of a landslide dam provide important information for further dam stability analysis. The proposed methodology is applied to a real landslide dam case at Hsiaolin Village. The result shows that the proposed method can be used to assess the landslide dam geometry.
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| 关 键 词： | 几何分析 滑坡坝 诱发 降雨 地震 稳定性分析 评估方法 台湾 |
Rapid geometry analysis for earthquake-induced and rainfall-induced landslide dams in Taiwan |
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| Kun-Ting CHEN,Yu-Shu KUO,Chjeng-Lun SHIEH.Rapid Geometry Analysis for Earthquake-induced and Rainfall-induced Landslide Dams in Taiwan[J].Journal of Mountain Science,2014,11(2):360-370. |
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| Authors: | Kun-Ting Chen Yu-Shu Kuo Chjeng-Lun Shieh |
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| Institution: | 1. Department of Hydraulic and Ocean Engineering, National Cheng-Kung University, 70101, Tainan, Chinese Taipei
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| Abstract: | Stability analysis of the dam is important for disaster prevention and reduction. The dam’s geometry plays an important role in understanding its stability. This study develops a rapid landslide dam geometry assessment method for both earthquake-induced and rainfall-induced landslide dams based on nine real cases collected in Chinese Taipei and 214 cases collected worldwide. For simplification purposes, a landslide dam is classified into triangular or trapezoidal. The rapid landslide dam geometry assessment method in this paper uses only satellite maps and the topographic maps to get landslide area, and then analyze the dam geometry. These maps are used to evaluate the area of the landslide and the slope of the river bed. Based on the evaluation information, the proposed method can calculate dam height, the length of the dam, and the angles of the dam in both upstream and downstream directions. These geometry parameters of a landslide dam provide important information for further dam stability analysis. The proposed methodology is applied to a real landslide dam case at Hsiaolin Village. The result shows that the proposed method can be used to assess the landslide dam geometry. |
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| Keywords: | Landslide dam Dam geometry Dam stability analysis |
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